I don't know whether this is possible in share point or not but can some one please confirm about this . I have created a multi-lingual term set so for eg for a term called energy i added a Spanish term also called Energía now when i am tagging if i tagged a document with Energy (or) Energía the document should appear on search .but its not happening like that .Is this default behavior can i achieve my requirement with any other way . for more clear understanding i am attaching my terms

you would need that beyond tagging content to also run a full crawl. go onto the SSA and under Managed Properties and see if you find your actual Managed Metadata column mapped. have a look at your Crawl Log see if no issues appear.
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C. Marius - MVPJun 26 '12 at 19:47

Hi Marius Thanks for the comment . But when i am searching after a full crawl for the tag Energy in default laungauge (English ) the document is appearing .but when i am searching for Energia its not appearing ...also all these are terms so do i need to map every individual term if so can you please elaborate on that,..
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AnilJun 26 '12 at 19:58

have you simply tried with a site in another language (Spanish)? as SharePoint uses those labels particularly in that case
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C. Marius - MVPJun 27 '12 at 6:02